iOS (Jailbroken): Sparrow for iPhone was released last week with a slight catch—it can't handle push notifications because Apple won't allow it. If you're jailbroken, you can easily fix this problem with a free tweak.

Jailbreaking is a process that changes little by little with each iOS upgrade. Rather than always…
Read more Read more

Jump onto Cydia and search for "Sparrow Push" to find and install this little adjustment. Once installed you'll be able to open Sparrow and jump into your settings. There you will find a new toggle switch called "Push" which will be on by default. That's all you have to do—you'll instantly have push notifications in Sparrow. Currently there's not Notification Center support, but if you're really aching for push you can at least have part of that functionality now.